ST. LOUIS, Missouri - What seemed like a normal call for two Maryland Heights Fire Protection District firefighter paramedics quickly turned into an unsteady situation unknowingly captured by a stranger.

Jon Stillpass and Shaylor Taetz, who have both been working as paramedics and firefighters for about seven years, had to go to extreme lengths to get a patient to DePaul Hospital in wintry conditions. The two had no idea the event was photographed by Carol Parks, one of the hospital's nurses.

Taetz tells CNN he had picked up an extra shift and was 10 minutes into his coffee when they had to head out on the road for a call concerning a traffic accident.

The two came upon the scene of a metro bus, loaded with just the driver, that had slid on ice and spun around in the opposite direction. The ambulance itself started to slide as they approached, but Stillpass managed to keep the vehicle on the road.

Though Taetz says the driver didn't have any life-threatening injuries, she was shaken up, and it was clear she needed to be taken to the hospital for evaluation.

(SSM Health DePaul Hospital)

Both men salted around the ambulance enough to get back on the road.

When they took the exit for the hospital, they saw several cars that had clearly slid on ice, so Stillpass then added chains to the wheels of the ambulance, hoping to gain traction. Even with chains, they slid into a guardrail, but managed to get out again. Then, a little over a mile away from the hospital, they slid on ice again, and Taetz says. Stillpass skillfully guided the ambulance away from a 15-foot drop into a small ravine on the left side of the road. However, the vehicle was stuck, and the patient was clearly getting distressed by the situation.